Uploaded July 2021 | Updated September 2026, 2 hours ago

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You need to look over your coolant expansion tank if you have a mystery coolant loss.
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The old style tanks loose coolant as you bounce down the road or even from backing into your driveway. The coolant overflow hose drips in front of your radiator and makes it look like your lower rad hose is leaking. reservoir expansion low Chevrolet Savana GMC diy how to 1500 2500 3500 2003 through 2019

Yes, the Dorman tank says it is a wiper reservoir...but obviously it is not.

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